Not caused by oil spills, but because of leakage after the oil pressure caused by insufficient, so as long as close attention to the oil level can be.
The main hazard is the loss of oil, causing waste, serious may lead to oil shortage and thus lead to damage to the engine.
Engine oil spill is one of the common faults, do not have to panic!
Is your cylinder cracked? If not the cylinder pad that oozing, for a cylinder pad on it